GLOSSARY 719 
ExALBu’Minous.—Applied to a seed in which the nourishment is stored in the 
embryo during the growth of seed from the ovule stage. 
Excen’tric.—See Eccentric. 
Excres’cENCE.—A morbid outgrowth. 
Excre’T10n.—Getting rid of nitrogenous waste. 
Excur’RENT.—Applied to trees, the main stems of which do not disappear in 
branches but grow erect to the summit, ending in a terminal bud. The 
opposite of Deliquescent. 
Exro’LiATe.—To shed layers of bark. To cast off layers of tissue. 
Ex’1nE.—The outer wall of a pollen grain. 
Ex’ocArp.—The outer layer of the pericarp. 
Exoc’rnous.—Applied to the axes of Gymnosperms and Dicotyledons which 
increase materially in diameter. 
Ex’ocens.—Plants with exogenous axes. 
Exospor’tum.—The outer wall of a spore. 
ExsERT’ED.—Applied to stamens that protrude from the throat of the corolla. 
Ex’t1neE.—The outer wall of a pollen grain. 
Exrrorse’.—Applied to anthers which face outward, away from the gynoecium. 
Face.—The free surface of an organ. 
FAL’cAte.—Scythe or sickle-shaped. 
Fam’1ry.—A sub-division of an order. 
Farina’ceous.—Starchy or mealy. 
Fas’cicte.—A bundle or cluster. 
Fascic’uLAR.—Belonging to a bundle. 
Fascic’uLAR CAMBIuM.—See Cambium. 
Fascic’uLATE.—Clustered. 
Fats.—Glyceryl esters of fatty acids that tend to solidify and crystallize at ordinary 
temperatures. 
Fec’uLA.—The nutritive part of a cereal. 
Fer’t1e.—Producing fruit or reproductive organs. Applied to flowers which 
contain functionally active stamens and carpels. 
FEeRTILIZA’TION.—That method of reproduction characterized by the union of two 
dissimilar gametes. 
Fi’ser.—A cell that is much elongated, thick-walled, usually lignified, tapering 
more or less to a point at either end and primarily functioning mechanically. 
Fy’srous.—Fiber-like. Referring to root systems composed of many slender 
rootlets. 
Frsrovas’CULAR Bun’pLE.—A stringy group of fibers, vessels or tracheids and cells 
coursing through the various organs of the higher plants and serving for sup- 
port and conduction of sap. 
Fi.’AMENT.—The stalk of a stamen; a thread-like structure. 
Fr_AMEn’Tous.—I hread-like. . 
Fr’1rorm.—Lhread-like. 
Frv’sRIATED.—Fringed. 
Fis‘ston.—A form of division in which the cell separates into two equal or nearly 
equal parts. 
Fis’TULAR.—Hollow and cylindrical. oe 
Fixep Ors.—Glyceryl esters of fatty acids that tend to remain liquid at ordinary 
temperatures. — 
